Stayed in the new building in a penthouse appartment. Spacious. Very nice pool.

Our family spend 2 weeks holiday in Kos and we stayed in Peridis Family Resort. Positive about the hotel / resort:
1) It is clean (rooms, common areas, pool, etc), 2) Pool area is good, actually very nice, 3) Restaurant quality is OK, 4) City center and related services are close the hotel (walking distance). 5) Restaurant serves everything to pool area, which is nice. 6) Hotel staff is friendly and helpful.
Things that good be a bit better:
1) You need to pay extra for AC (7€/day for larger rooms), 2) Gym is not very convincing, 3) No laundry possibility at the resort, 4) Street noise, with some heavy traffic, really carries into the rooms (also during nightime!), 5) water boiler keeps banging sounds during some nights (2-3 times per week). This was really irritating.

The rooms are nice and big, but there were a lot of noise from the street outside.
We expected the hotel to be closer to the beach, so we were a bit dissappointed.
We asked in the reseption for directions to the closest beach, and we were sent to the city beach which was about half an hour walk away. But when we sat on the bus to the airport we descovered a great beach right next to the hotel in the other direction. This was a bit annoying....
The breakfast was ok. They were not very good at filling up the treys when it was empty.
We had somehow problems changing our beachtowels. We were told to leave them on the floor in our room and it would be changed. But instead they had just picked them up from the floor and put them on the sofa. Luckily we had our own...
The hotel should have a reservation-policy for the sunbeds, because the guests put out their towels on the beds early in the morning without using them, so all the best beds were taken when we got there.. I find this very rood.
All in all, nice place but not too great either.

A collection of low-rise, white apartment blocks, one of which directly overlooks the pool, and a cafe/bar. Friendly and helpful staff - barman works his butt off but always smiling. Apartment was very good value. Basic furnishings (as you'd expect for a holiday apartment) but perfectly adequate and spotlessly clean, as was everywhere round the place. Sheets and towels changed every other day, full clean twice a week. Kitchen area had fridge + two-ring hob + microwave + coffee machine and basic pots, crockery and cutlery. A bit of a botch-job in the bathroom but everything worked fine even so. Great balcony wrapping round two sides of the apartment. Not all apartments over-look pool; some are over the road - good if you want to avoid bar entertainment noise in the evening, but then you road noise instead (not too bad; not a very busy road, but I speak as someone who lives in a city so if you're from a quiet village it might drive you nuts). Avoid basement apartments - didn't see inside one but they look dark, even though they have a little kind of dug-out terrace instead of a balcony. Aircon costs an extra 6 euros a night, so make sure you really need it before booking it (we went Sept and didn't even though it was still hot during the day). Good size pool, very clean, with lots of sun beds. There's also a little gym and tennis court. Peridis Apartments are in a good good location 15 mins walk from harbour area with lots of restaurants and bars in easy walking distance. On Psalidi side of town in residential area, so nice and quiet (apart from late night Karaoke once a week from the hotel a couple of doors down). Suited to families with younger kids, empty-nesters and oldies, but teenagers and twentysomethings will probably want to be at the Lambi end of town where all the clubs are. Beware - reception closes at 11pm and the night watchman may not be there after that, so let them know if you're likely to arrive late. We assumed there'd be 24 hour reception, arrived at 4am, and had to sleep on sunbeds by the pool until reception opened! Enough to do in Kos town to last a couple of weeks with a mixture of pool/beach, restaurants and bars, watersports, historical sites like the castle and various Roman ruins, and cycling. You can also do boat tours to other islands or Bodrum in Turkey (20 mins on fast boat). There's a good network of flat cycle paths (properly separated from the road) and out-of-town roads are quiet, so really worth hiring a bike to get around. Would definitely recommend this hotel and Kos town generally. I tend not to go back to the same place twice as I prefer to try new things, but if I was the kind of person who likes to go back to somewhere, I would definitely go back here.